Szukana fraza: [Abstract = "A frame is a flexible representation of statements and rules. It is especially attractive for the designing of interfaces with an expert system. It has been shown in the paper, that frames are a useful tool in the designing of reasoning systems for technical diagnostics. They can be successfully applied to support the most difficult part of such a task \- i.e. to acquire knowledge. The main features of an expert system shell composed of a frame interpreter and tools for programmers have been presented, too."]